ok im really focusing on reducing excess string noise at high speed at the moment, i've got ascending runs down fine by using my palm to mute the string behind the string im playing on, but what about decsending?

Do you try to use your fretting fingers to mute the previous string because im finding that difficult to maintain whilt trying to keep correct finger technique at speed. Is there another way to do it???

I hope i managed to get accross my question ok

Thanks in advance!